Nut-lock.



J. S. BALDWIN.

NUT LOCK.

APPLICATION FILED 141111.20, 1912.

1,057,612, Patented Apr.1,1918

coLumalA PLANOGRAPH co.,wAsmNu1oN, o.c.

UNITED STTE 'Arnn'r orrron.

N UT-LOCK.

owers.

To all whom it may concern:

Be it known that I, JOSEPH S. BALDWIN, a citizen of the United States,residing at King of Prussia, in the county of Montgomcry and State ofPennsylvania, have invented certain new and useful Improvements inNut-Locks, of which the following a specification.

My invention relates to improvements in nut locks, the object of theinvention being to provide a nut with improved locking means carried'bythe nut, and which may be operated to engage the threads of the bolt andlock the nut against turning movement.

A further object is to provide a nut looking means of this characterwhich may be turned to lock or unlock, so that the nut may be removedfrom the bolt at any time desired.

Vith these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings: Figure 1, is a view in end elevationillustrating my improvement-s. Fig. 2, is a view in section through thenut showing the same in position on a bolt. Fig. 3, is a view partly inelevation and partly in section showing the locking mechanism in lockedposition. Fig. 4;, is a view of the nut with the locking mechanismremoved. Fig. 5 is a perspective view of the spring which holds thelocking mechanism against accidental movement, and Fig. 6, is a detailperspective View of the locking member on an enlarged scale.

1 1, represents an ordinary bolt having a head 2 at one end, and screwthreads 3 at its other end.

4, is my improved nut having a screwthreaded opening 6 to receive thethreads 3 of the bolt, and provided in itsouter face, in one corner,with a circular recess 5 which communicates with the threaded opening 6by means of a groove 7 In the circular recess 5, a rotary member 8 islocated and comprises two circular disks connected by an integraleccentric pin 9. The outer circular disk has a screw-driver receivingslot 10 therein to facilitate the turning thereof, and this outer diskis made with a milled periphery 11 engaged by a milled surface 12 on theSpecification of Letters Patent.

Application filed March 20, 1912.

Patented Apr. 1, 1913:.

Serial No. 884,949.

free end of a spring 13. This spring 13 is located in a triangularshaped recess 14 in the outer face of the nut, and one end is secured tothe nut in any approved manner. The crank pin 9, connecting the twodisks, extends through a disk 15, and this disk 15 having an angularrecess therein extending inwardly from one edge to a point beyond thecenter of the disk is provided with a spur 16. This spur 16 is adaptedto project through the groove 7 and engage between the threads 3 of thebolt, and on its outer face is provided with a cutting tool 17 whichbites into the threads of the bolt. In other words, this projection onthe disk 15 is of stepped form as shown most clearly in Figs. 2, and 3,the outer portion constituting a sharp tooth 17 to bite the threads,while the inner portion is longer and projects between the threads ofthe bolt. This spur and tooth are projected or withdrawn by turning thedisks 8 which is accomplished by employing any ordinary screw-driver. Asthe pin 9 is eccentrically located, the rotary mo tion of the disks willcause the spurs 16 and tooth 17 to move toward or away from the threadsof the bolt, so that the latter may be locked or released. The spring 13holds the parts in any position of adjustment.

Various slight changes might be made in the general form and arrangementof parts described without departing from my invention, and hence I donot limit myself to the precise details set forth, but consider myselfat liberty to make such changes and alterations as fairly fall withinthe spirit and scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. The combination with a nut having a circular recess in one face, of arotary member fitting the circular recess and comprising two disksspaced apart wit-h an eccentric pin connecting them, a locking memberlocated between the disks and having a recess receiving the crank pin,and a tooth on said locking member adapted to be projected intoengagement with the threads of the bolt by the rotary movement of saidlocking member, substantially as described.

2. In combination with a nut having a recess in one face, a lockingmember positioned in the said recess, a support on said locking memberadapted to be projected be- In testimony whereof I have signed my tweenthe threads of a bolt When the latter name to this specification in thepresence of is positioned in the nut, a tooth integral With twosubscribing witnesses.

said support and adapted to bite into the JOSEPH S. BALDWIN. threads ofthe bolt, and means for advanc- Witnesses:

ing the tooth and spur toward the bolt, sub- J. LEROY SCHWEYER,

stantially as described. CHAS. E. Po'r'rs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

